diff --git "a/\346\235\250\351\221\253\344\273\252/20220523-php\346\225\260\346\215\256\345\272\223.md" "b/\346\235\250\351\221\253\344\273\252/20220523-php\346\225\260\346\215\256\345\272\223.md"
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index 0000000000000000000000000000000000000000..a053631d144f5a57625f756cf850357ac072d886
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+++ "b/\346\235\250\351\221\253\344\273\252/20220523-php\346\225\260\346\215\256\345\272\223.md"
@@ -0,0 +1,54 @@
+```sql
+-- Mysql中新建个student数据库，里面有个学生信息表user
+create database student charset utf8;
+use student;
+create table user(
+id int primary key auto_increment,
+name varchar(10) not null,
+score decimal(3,1) not null
+);
+```
+```php
+// 完成PHP访问数据库五步。使用mysqli扩展对mysql数据库中的学生信息表进行增删改查。
+
+<?php
+//数据库连接
+$conn = mysqli_connect('127.0.0.1','root','123456','student');
+mysqli_query($conn,'set names utf8');
+if (!$conn){
+    die("连接失败:".mysqli_connect_error());
+}
+$sql="insert into `user`  value (1 ,'陈小龙','98.5'),(2 ,'吴大虫','75.5'),(3 ,'陈得胜','66')";
+//增加数据
+$result = mysqli_query($conn,$sql);
+if ($result){
+    echo "添加数据成功 <br>";
+}else{
+    echo "添加数据失败 <br>";
+}
+echo  "<br>";
+//删除数据
+$sc= "delete from `user` where `id`=3";
+$result1= mysqli_query($conn,$sc);
+if ($result1){
+    echo "删除数据成功 ";
+}else{
+    echo "删除数据失败 ";
+}
+echo"<br>";
+//修改数据
+$xiugai= "update `user` set `score`='55' where `id`=2  ";
+$result2 = mysqli_query($conn,$xiugai);
+if ($result2){
+    echo "修改数据成功";
+}else{
+    echo "修改数据失败";
+}
+echo "<br>";
+//查找数据
+$chazhao = "select * from `user` where 'score'=66 ";
+$result3 = mysqli_query($conn,$chazhao) or die("查找数据失败<br>");
+while($a=mysqli_fetch_assoc($result3) ){
+    echo $a['id']." ".$a['name']." ".$a['score']."<br>";
+}
+```